---
title: "CVE-2026-90797: Apache CouchDB - Denial of Service"
description: "Apache CouchDB <= 3.5.2 contains a denial of service caused by unlimited gzip decompression in chttpd, letting remote clients exhaust memory, exploit requires no special conditions."
url: https://panop.io/threat-heartbeat/CVE-2026-90797/
---

# CVE-2026-90797 Apache CouchDB - Denial of Service

Apache CouchDB <= 3.5.2 contains a denial of service caused by unlimited gzip decompression in chttpd, letting remote clients exhaust memory, exploit requires no special conditions.

CVSS base score 7.7 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90797)

## Details

Type

Denial of Service

Impact

Denial Of Service

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:Y/R:A/V:D/RE:M/U:Red

Published

20 October 2026

Updated

21 October 2026

Weakness

[CWE-409](https://cwe.mitre.org/data/definitions/409.html)

## Vendor fix

Upgrade to version 3.5.3.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-90797](https://nvd.nist.gov/vuln/detail/CVE-2026-90797)
- [https://lists.apache.org/thread.html/pj83174r8f8f64odf47fwhozbfjtot0f](https://lists.apache.org/thread.html/pj83174r8f8f64odf47fwhozbfjtot0f)
- [https://lists.apache.org/thread/gsbotof0qn8x6zlpd7t568ny4053jo0n](https://lists.apache.org/thread/gsbotof0qn8x6zlpd7t568ny4053jo0n)
- [http://www.openwall.com/lists/oss-security/2026/10/20/12](http://www.openwall.com/lists/oss-security/2026/10/20/12)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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